82470840 has 64 divisors (see below), whose sum is σ = 248844960. Its totient is φ = 21864960.

The previous prime is 82470833. The next prime is 82470851. The reversal of 82470840 is 4807428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19822 + ... + 23618.

Almost surely, 2^82470840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82470840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124422480).

82470840 is an abundant number, since it is smaller than the sum of its proper divisors (166374120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82470840 is a wasteful number, since it uses less digits than its factorization.

82470840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992 (or 3988 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 82470840 is about 9081.3457152561. The cubic root of 82470840 is about 435.2780887981.

The spelling of 82470840 in words is "eighty-two million, four hundred seventy thousand, eight hundred forty".